@Override
public final boolean incrementToken() throws IOException {
clearAttributes();
// Fill the queue on first call
if (!readQueueResetted) {
readQueueResetted = true;
readQueue.clear();
for (PositionedTokenStream pts : positionedTokenStreams) {
if (pts == null) {
continue;
}
// Read first token
pts.clearAttributes();
if (pts.incrementToken()) {
// PositionedTokenStream.incrementToken() initialized internal
// variables to perform proper ordering.
// Therefore we can only add it to the queue now!
readQueue.add(pts);
} // no token left (no token at all)
}
}
// Read from the first token
PositionedTokenStream toRead = readQueue.peek();
if (toRead == null) {
return false; // end of streams
}
// Look position to see if it will be increased, see usage a bit below
int pos = toRead.getPosition();
// Copy the current token attributes from the sub-TokenStream to our AttributeSource
restoreState(toRead.captureState());
// Override the PositionIncrementAttribute
this.getAttribute(PositionIncrementAttribute.class)
.setPositionIncrement(Math.max(0, pos - lastPosition));
// Prepare next read
// We did not remove the TokenStream from the queue yet,
// because if we have another token available at the same position,
// we can save a queue movement.
toRead.clearAttributes();
if (!toRead.incrementToken()) {
// No more token to read, remove from the queue
readQueue.poll();
} else {
// Check if token position changed
if (readQueue.size() > 1) {
// If yes, re-enter in the priority queue
readQueue.add(readQueue.poll());
} // Otherwise, next call will continue with the same TokenStream (less queue movements)
}
lastPosition = pos;
return true;
}
@Override
public void run() {
Message message;
List<Agent> agents = equipe.getAgents();
while (threadRunning) {
message = messages.poll();
if (message != null) {
for (Agent agent : agents) {
if (!agent.equals(message.emmetteur) && agent.estEnVie()) {
agent.recoitMessage(message.contenu);
}
}
}
}
}
/**
* Method createDensityTable TODO: document me!!
*
* @param vertexTable
* @param sizePoints
* @return
* @throws SQLException
*/
private ArrayList<DensityEntry> createDensityTable(String vertexTable, int[] sizePoints)
throws SQLException {
ArrayList<DensityEntry> result = new ArrayList<DensityEntry>();
int vertexSize = DBUtility.getTotalVertexSize(connection, vertexTable, true);
Vertex[] V = new Vertex[vertexSize];
int maxSize = sizePoints[sizePoints.length - 1];
DBResult dbResult = DBUtility.getAllVerticesSortedByX(connection, vertexTable);
ResultSet rSet = dbResult.getResultSet();
int i = 0;
while (rSet.next()) { // filling the array with values
V[i++] = new Vertex(rSet.getInt(1), rSet.getDouble(2), rSet.getDouble(3));
}
double[] distances = new double[maxSize];
// defining comparator
Comparator<Double> descendingCmp =
new Comparator<Double>() {
@Override
public int compare(Double o1, Double o2) {
if (o1 < o2) return 1;
if (o1 > o2) return -1;
return 0;
}
};
AbstractQueue<Double> heap = new PriorityQueue<Double>(maxSize, descendingCmp);
for (i = 0; i < vertexSize; i++) {
System.out.println("Iteration: " + i + "/" + vertexSize);
double k = Double.POSITIVE_INFINITY;
int size = 0;
int l = i, r = i, idx = 0;
while (V[r].x - V[l].x <= 2 * k && idx < vertexSize - 1) {
if (l == 0) { // left out of range condition
idx = ++r;
} else if (r == vertexSize - 1) { // right out of range condition
idx = --l;
} else { // choose between left and right element that one with smallest distance to its
// neighbor
idx = V[i].x - V[l - 1].x < V[r + 1].x - V[i].x ? --l : ++r;
}
if (size < maxSize) { // as long we do not reach max size we simply add in heap and sort
heap.add(eDist(V[i], V[idx]));
size++;
} else {
double d = eDist(V[i], V[idx]);
if (heap.peek() > d) {
heap.poll();
heap.add(d);
k = heap.peek();
}
}
}
// convert heap to a sorted array
int j = distances.length - 1;
while (!heap.isEmpty()) {
distances[j--] = heap.poll();
}
// reading for each size the corresponding euclidean distance
for (j = 0; j < sizePoints.length; j++) {
int p = sizePoints[j];
result.add(new DensityEntry(V[i].id, p, distances[p - 1]));
}
}
return result;
}